W59.21XS ICD-10-CM Code: Bitten by turtle, sequela
Billing Status: YES. This is a valid, specific, and billable ICD-10-CM reference.
Code Set: Valid FY2026 and FY2027. FY2026 took effect October 1, 2025.
Official Registry Overview & Definition
Bitten by turtle, sequela is a billable ICD-10-CM diagnosis code (W59.21S).
Official Tabular Instructional Notes
Sequencing, inclusion, and exclusion notes published for W59.21XS in the official ICD-10-CM tabular list.
Excludes1 — Not Coded Here
Conditions that can never be reported with this code; the two are mutually exclusive.
- contact with tortoises (W59.8-)
- contact with venomous reptile (T63.0-, T63.1-)
- Toxic effect of contact with venomous animals and plants (T63.-)
Frequently Asked Questions (FAQ) & Clinical Guidance
Does W59.21XS require a 7th character?
Yes. The appropriate 7th character is to be added to each code from category W59.
Nearest Codes in This Family
Official ICD-10-CM classifications closest to W59.21XS in its code family, with their registry titles.
- W59.19XS — Other contact with nonvenomous snake, sequela
- W59.2 — Contact with turtles
- W59.21 — Bitten by turtle
- W59.21XA — Bitten by turtle, initial encounter
- W59.21XD — Bitten by turtle, subsequent encounter
- W59.22 — Struck by turtle
- W59.22XA — Struck by turtle, initial encounter
- W59.22XD — Struck by turtle, subsequent encounter
- W59.22XS — Struck by turtle, sequela
- W59.29 — Other contact with turtle